Los 536
ISSUES FPR ECUADOR: 1928, Provisional Overprint in red 75 c. red and additional franking Ecuador 1 c. blue and 5 c. brown tied by black dated cachet "SERVICO DE TRANSPORTES AEREOS ECUADOR-COLUMBIA GUAYQUIL SCADTA 22.ENE.1929" to cover via Barranquilla to Berlin, fine, scarce
